But now use of the canal is in jeopardy because of lower water levels.

但现在，由于水位下降，运河通航处于危险之中。

Heat waves and drought, a long period without rain, are raising water temperatures and lowering water levels.

热浪和长时间不下雨的干旱，导致水温升高，水位下降。

A severe drought has sharply lowered water levels in a lake that's part of the Panama Canal.

严重干旱使巴拿马运河的一个湖泊水位急剧下降。